Soak the minced green onions and ginger in 200ml water, squeeze with your fingers, and then drain the onions and ginger to retain the liquid.
Mix ground pork with reserved liquid, corn starch, salt, white pepper powder. Stir to thoroughly mix the pork filling.
Add minced shrimp, mix well.
Spoon 1 tbsp of pork filling onto the center of each wonton wrapper. Fold each corner of the wrapper over the filling, and press the edges together to seal.
Cook the wonton in boiling water for 4 minutes.
Transfer the soup to a bowl, add a pinch of salt and white pepper powder, serve with minced spring onion.